#include <iostream>
#include <string>
#include <sys/time.h>


using namespace std;

int main (void)
{
	char suff[30];
	struct tm* nowtime;
	time_t nt;

	nt = time(NULL);
	nowtime = localtime(&nt);
	cout << sizeof(suff) << endl;
	strftime(suff, sizeof(suff), "%y%m", nowtime);
	cout << suff << endl;
	string tabsuff("_");
	tabsuff.append(suff, 4);
	cout << tabsuff << tabsuff.size() << endl;

	return 0;
}
